on 24-09-2023 22:40
on 25-09-2023 07:53
You need to register here https://www.o2.co.uk/charge-to-mobile
If you have further issues, you need to contact O2.
If you message O2 on Facebook (https://o2uk.co/O2CFB) , Twitter (https://o2uk.co/O2CTW) or Instagram (https://o2uk.co/O2CIG) , they should be able to help you with this
Thanks